Hierarchical follow-up of sub-threshold candidates of an all-sky Einstein@Home 
search for continuous gravitational waves on LIGO sixth science run data

Papa, Maria Alessandra; Eggenstein, Heinz-Bernd; Walsh, Sinéad; Di Palma, Irene; Allen, Bruce; Astone, Pia; Bock, Oliver; Creighton, Teviet D.; Keitel, David; Machenschalk, Bernd; Prix, Reinhard; Siemens, Xavier; Singh, Avneet; Zhu, Sylvia; Schutz, Bernard F.

doi:10.1103/PhysRevD.94.032006

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Hierarchical follow-up of sub-threshold candidates of an all-sky Einstein@Home search for continuous gravitational waves on LIGO sixth science run data

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Papa, Maria Alessandra
Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

Eggenstein, Heinz-Bernd
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Di Palma, Irene
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40518

Allen, Bruce
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Bock, Oliver
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons41554

Keitel, David
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40529

Machenschalk, Bernd
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons40534

Prix, Reinhard
Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons192124

Singh, Avneet
Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons192133

Zhu, Sylvia
Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

/persons/resource/persons20673

Schutz, Bernard F.
Astrophysical Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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1608.08928.pdf
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PRD94.122006.pdf
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Citation

Papa, M. A., Eggenstein, H.-B., Walsh, S., Di Palma, I., Allen, B., Astone, P., et al. (2016). Hierarchical follow-up of sub-threshold candidates of an all-sky Einstein@Home search for continuous gravitational waves on LIGO sixth science run data. Physical Review D, 94: 122006. doi:10.1103/PhysRevD.94.032006.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002C-39BA-E

Abstract

We report results of an all-sky search for periodic gravitational waves with frequency between 50 and 510 Hz from isolated compact objects, i.e. neutron stars. A new hierarchical multi-stage approach is taken, supported by the computing power of the Einstein@Home project, allowing to probe more deeply than ever before. 16 million sub-threshold candidates from the initial search [LVC,arXiv:1606.09619] are followed up in three stages. None of those candidates is consistent with an isolated gravitational wave emitter, and 90% confidence level upper limits are placed on the amplitudes of continuous waves from the target population. Between 170.5 and 171 Hz we set the most constraining 90% confidence upper limit on the strain amplitude h0 at 4.3x10-25 , while at the high end of our frequency range we achieve an upper limit of 7.6x10-25. These are the most constraining all-sky upper limits to date and constrain the ellipticity of rotating compact objects emitting at 300 Hz at a distance D to less than 6x10-7 [d/100pc].